| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.h" |
| |
| #include "components/page_load_metrics/browser/page_load_metrics_util.h" |
| #include "components/page_load_metrics/common/page_load_timing.h" |
| #include "content/public/browser/navigation_handle.h" |
| #include "net/base/stale_while_revalidate_experiment_domains.h" |
| |
| namespace chrome { |
| |
| StaleWhileRevalidateMetricsObserver::StaleWhileRevalidateMetricsObserver( |
| page_load_metrics::PageLoadMetricsObservable* metrics) |
| : is_interesting_domain_(false), metrics_(metrics) {} |
| |
| void StaleWhileRevalidateMetricsObserver::OnCommit( |
| content::NavigationHandle* navigation_handle) { |
| is_interesting_domain_ = net::IsHostInStaleWhileRevalidateExperimentDomain( |
| navigation_handle->GetURL().host()); |
| } |
| |
| void StaleWhileRevalidateMetricsObserver::OnComplete( |
| const page_load_metrics::PageLoadTiming& timing, |
| const page_load_metrics::PageLoadExtraInfo& extra_info) { |
| if (!is_interesting_domain_) |
| return; |
| |
| if (!timing.load_event_start.is_zero()) { |
| PAGE_LOAD_HISTOGRAM( |
| "PageLoad.Clients.StaleWhileRevalidateExperiment.Timing2." |
| "NavigationToLoadEventFired", |
| timing.load_event_start); |
| } |
| if (!timing.first_layout.is_zero()) { |
| PAGE_LOAD_HISTOGRAM( |
| "PageLoad.Clients.StaleWhileRevalidateExperiment.Timing2." |
| "NavigationToFirstLayout", |
| timing.first_layout); |
| } |
| if (!timing.first_text_paint.is_zero()) { |
| PAGE_LOAD_HISTOGRAM( |
| "PageLoad.Clients.StaleWhileRevalidateExperiment.Timing2." |
| "NavigationToFirstTextPaint", |
| timing.first_text_paint); |
| } |
| } |
| |
| void StaleWhileRevalidateMetricsObserver::OnPageLoadMetricsGoingAway() { |
| metrics_->RemoveObserver(this); |
| delete this; |
| } |
| |
| } // namespace chrome |